Re: 928S euro cylinder wear query -- 928S4VR Forum

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Date Posted: 00:04:22 09/04/02 Wed
Author: Andre Moore
Author Host/IP: 64.161.171.170
Subject: Re: 928S euro cylinder wear query
In reply to: Eran Sharon 's message, "928S euro cylinder wear query" on 15:26:18 05/27/02 Mon

>Hi,
>My 1982 euro 928S (engine type M2811) has a two
>thousands of a millimeter wear on the cylinder heads.
>wear is even and no scratches or defects are evident
>on any of the cylinders. the "step" is only noticed by
>touch. All in all, the cylinders show a very good
>surface texture.
>
>Can anyone suggest whether the condition described
>above shall require cylinder preparation (honing and
>surface lapping) prior to installing new rings ? i
>have no wish of oversizing the cylinder unnecessarily
>(plus, no one will ever do it properly where I live).
>
>Thanks
>Eran Sharon
>(usually) happy 928 owner...
Hello Eran, I'm sure you have gotten lots of advice regarding your question by now. However in case you have not, and havn't done the work yet. my advice is not to do anything to your cylinder bores. If there are no deep vertical scratches (deep enough to feel with your fingrnail) assuming you have measured the bores and they are within limits install your new rings. The shop manual warns against honing the bores. If the wear limits have been exceeded then the bores must be reconditioned following the boring and etching process. I think your heads are ok provided you use the proper gasket. How are the valave guides?

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